公开(公告)号：US5466308A

公开(公告)日：1995-11-14

申请号：US194647

申请日：1994-02-10

申请人： Setsuo Fujimura ,  Yutaka Matsuura ,  Masato Sagawa

发明人： Setsuo Fujimura ,  Yutaka Matsuura ,  Masato Sagawa

IPC分类号： C22C1/04 ,  H01F1/057 ,  C22C38/10

CPC分类号： C22C1/0441 ,  H01F1/057 ,  H01F1/0577

摘要： Magnetic materials comprising Fe, B, R (rare earth elements) and Co having a major phase of Fe-Co-B-R intermetallic compound(s) of tetragonal systems and sintered anisotropic permanent magnets consisting essentially of, by atomic percent, 8-30% R (at least one of rare earth elements inclusive of Y), 2-28% B, no less than 50% Co, and the balance being Fe with impurities. Those may contain additional elements M (Ti, Ni, Bi, V, Nb, Ta, Cr, Mo, W, Mn, Al, Sb, Ge, Sn, Zr, Hf) providing Fe-Co-B-R-M type materials and magnets.

摘要翻译： 包含Fe，B，R（稀土元素）和具有四方晶系的Fe-Co-BR金属间化合物的主相的Co的磁性材料和基本上由原子百分比组成的烧结各向异性永久磁体的磁性材料为8-30％ R（包括Y的稀土元素中的至少一种），2-28％B，不低于50％的Co，余量为含杂质的Fe。 这些可以含有Fe-Co-B-R-M型材料和磁铁的附加元素M（Ti，Ni，Bi，V，Nb，Ta，Cr，Mo，W，Mn，Al，Sb，Ge，Sn，Zr，Hf）。

公开(公告)号：US5411603A

公开(公告)日：1995-05-02

申请号：US162292

申请日：1993-12-07

申请人： Fernand Vial ,  Masato Sagawa

发明人： Fernand Vial ,  Masato Sagawa

IPC分类号： B02C19/06 ,  B02C23/18 ,  B22F9/04 ,  C04B35/00 ,  H01F1/057 ,  H01F1/06 ,  H01F7/02 ,  H01F41/02

CPC分类号： H01F41/026 ,  H01F1/0572

摘要： The invention concerns a method of protecting magnetic powders and permanent magnets containing at least one rare earth, at least one transition metal and boron from oxidation and atmospheric corrosion, by the introduction of gaseous fluorine during the grinding of the powders. It is characterized in that the fluorine is introduced by a mixture of F.sub.2 +N.sub.2 during the fine grinding of the powders, the mixture containing from 1 to 100 ppm (by volume) of fluorine, and preferably from 1 to 10 ppm. The powders thus obtained are far less reactive and the densified magnets are far more resistant to atmospheric corrosion than non fluorinated powders and magnets obtained therefrom.

摘要翻译： 本发明涉及通过在研磨粉末期间引入气态氟来保护含有至少一种稀土，至少一种过渡金属和硼的氧化和大气腐蚀的磁粉和永磁体的方法。 其特征在于，在粉末的细粉碎期间，通过F2 + N2的混合物引入氟，该混合物含有1〜100ppm（体积）的氟，优选为1〜10ppm。 由此获得的粉末的反应性低得多，并且致密化的磁体比非氟化粉末和从其获得的磁体更耐大气腐蚀。

公开(公告)号：US5230749A

公开(公告)日：1993-07-27

申请号：US728037

申请日：1991-07-08

申请人： Setsuo Fujimura ,  Masato Sagawa ,  Yutaka Matsuura ,  Hitoshi Yamamoto ,  Norio Togawa

发明人： Setsuo Fujimura ,  Masato Sagawa ,  Yutaka Matsuura ,  Hitoshi Yamamoto ,  Norio Togawa

IPC分类号： H01F1/057

CPC分类号： H01F1/0577

摘要： A magnetically anisotropic sintered permanent magnet of the FeCoBR system (R is sum of R.sub.1 and R.sub.2) wherein:R.sub.1 is Dy, Tb, Gd, Ho, Er, Tm and/or Yb, andR.sub.2 comprises 80 at % or more of Nd and Pr in R.sub.2, and the balance of other rare earth elements exclusive of R.sub.1,said system consisting essentially of, by atomic percent, 0.05 to 5% of R.sub.1, 12.5 to 20% of R, 4 to 20% of B up to 35% of Co, and the balance being Fe. Additional elements M(Ti, Zr, Hf, Cr, Mn, Ni, Ta, Ge, Sn, Sb, Bi, Mo, Nb, Al, V, W) may be present.

摘要翻译： FeCoBR系的磁各向异性烧结永磁体（R为R1和R2的和），其中：R1为Dy，Tb，Gd，Ho，Er，Tm和/或Yb，R2包含80原子％以上的Nd， Pr在R2中的余量以及不包括R1的其它稀土元素的余量，所述体系基本上由原子百分比组成，R1为0.05〜5％，R为12.5〜20％，B〜4％〜20％ 的Co，余量为Fe。 可以存在附加元素M（Ti，Zr，Hf，Cr，Mn，Ni，Ta，Ge，Sn，Sb，Bi，Mo，Nb，Al，V，W）。

公开(公告)号：US4859255A

公开(公告)日：1989-08-22

申请号：US165371

申请日：1988-02-29

申请人： Setsuo Fujimura ,  Masato Sagawa ,  Yutaka Matsuura ,  Hitoshi Yamamoto ,  Norio Togawa

发明人： Setsuo Fujimura ,  Masato Sagawa ,  Yutaka Matsuura ,  Hitoshi Yamamoto ,  Norio Togawa

IPC分类号： C22C38/00 ,  H01F1/053 ,  H01F1/057

CPC分类号： H01F1/0577

摘要： A magnetically anisotropic sintered permanent magnet of the FeCoBR system (R is sum of R.sub.1 and R.sub.2) wherein:R.sub.1 is Dy, Tb, Gd, Ho, Er, Tm and/or Yb, andR.sub.2 comprises 80 at % or more of Nd and Pr in R.sub.2, and the balance of other rare earth elements exclusive of R.sub.1,said system consisting essentially of, by atomic percent, 0.05 to 5% of R.sub.1, 12.5 to 20% of R, 4 to 20% of B up to 35% of Co, and the balance being Fe. Additional elements M(Ti, Zr, Hf, Cr, Mn, Ni, Ta, Ge, Sn, Sb, Bi, Mo, Nb, Al, V, W) may be present.

摘要翻译： FeCoBR系的磁各向异性烧结永磁体（R为R1和R2的和），其中：R1为Dy，Tb，Gd，Ho，Er，Tm和/或Yb，R2包含80原子％以上的Nd， Pr在R2中的余量以及不包括R1的其它稀土元素的余量，所述体系基本上由原子百分比组成，R1为0.05〜5％，R为12.5〜20％，B〜4％〜20％ 的Co，余量为Fe。 可以存在附加元素M（Ti，Zr，Hf，Cr，Mn，Ni，Ta，Ge，Sn，Sb，Bi，Mo，Nb，Al，V，W）。

公开(公告)号：US4767474A

公开(公告)日：1988-08-30

申请号：US567008

申请日：1983-12-30

申请人： Setsuo Fujimura ,  Masato Sagawa ,  Yutaka Matsuura

发明人： Setsuo Fujimura ,  Masato Sagawa ,  Yutaka Matsuura

IPC分类号： H01F1/057 ,  H01F1/04

CPC分类号： H01F1/0577

摘要： Isotropic permanet magnet formed of a sintered body having a mean crystal grain size of 1-130 microns and a major phase of tetragonal system comprising, in atomic percent, 10-25% of R wherein R represents at least one of rare-earth elements including Y, 3-23% of B, no more than 50% of Co and the balance being Fe. As additional elements M, Al, Ti, V, Cr, Mn, Zr, Hf, Nb, Ta, Mo, Ge, Sb, Sn, Bi, Ni or W may be incorporated.The magnets can be produced through a powder meallurgical process resulting in high magnetic properties, e.g., up to 7 MGOe or higher energy product.

摘要翻译： 由具有1-130微米的平均晶粒尺寸和四方晶系的主相形成的各向同性永久磁体，原子百分比包括R的10-25％，其中R表示稀土元素中的至少一种，包括 Y，B的3-23％，Co不超过50％，余量为Fe。 作为附加元素，可以加入M，Al，Ti，V，Cr，Mn，Zr，Hf，Nb，Ta，Mo，Ge，Sb，Sn，Bi，Ni或W。 磁体可以通过粉末冶金工艺生产，产生高磁性，例如高达7MGOe或更高的能量产物。

公开(公告)号：US4601875A

公开(公告)日：1986-07-22

申请号：US532471

申请日：1983-09-15

申请人： Hitoshi Yamamoto ,  Masato Sagawa ,  Setsuo Fujimura ,  Yutaka Matsuura

发明人： Hitoshi Yamamoto ,  Masato Sagawa ,  Setsuo Fujimura ,  Yutaka Matsuura

IPC分类号： C22C1/04 ,  H01F1/057 ,  B22F3/16 ,  C22C33/02 ,  C22C38/32

CPC分类号： C22C1/0441 ,  H01F1/0577 ,  Y10T29/49076

摘要： Permanent magnetic materials of the Fe-B-R type are produced by:preparing an metallic powder having a mean particle size of 0.3-80 microns and a composition of, by atomic percent, 8-30% R (rare earth elements), 2-28% B, and the balance Fe, compacting, sintering at a temperature of 900-1200 degrees C., and aging at a temperature ranging from 350 degrees C. to the temperature for sintering. Co and additional elements M (Ti, Ni, Bi, V, Nb, Ta, Cr, Mo, W, Mn, Al, Sb, Ge, Sn, Zr, Hf) may be present.

摘要翻译： 通过以下方式制备Fe-BR型永久磁性材料：制备平均粒径为0.3-80微米的金属粉末，原子百分比为8-30％的R（稀土元素），2-28 ％B，余量为Fe，压实，烧结温度为900-1200摄氏度，并在350摄氏度至烧结温度下老化。 可以存在Co和附加元素M（Ti，Ni，Bi，V，Nb，Ta，Cr，Mo，W，Mn，Al，Sb，Ge，Sn，Zr，Hf）。

公开(公告)号：US4459248A

公开(公告)日：1984-07-10

申请号：US355197

申请日：1982-03-05

申请人： Masato Sagawa ,  Wataru Yamagishi

发明人： Masato Sagawa ,  Wataru Yamagishi

IPC分类号： B22F1/00 ,  B22F3/14 ,  C22C1/04 ,  G01K7/36 ,  H01F1/00 ,  H01F1/01 ,  H01F1/055 ,  H01L37/04 ,  C04B35/50

CPC分类号： H01F1/0556 ,  B22F3/14 ,  C22C1/0441 ,  G01K7/38 ,  H01F1/012 ,  Y10S264/58 ,  Y10T29/49076

摘要： A temperature sensitive element comprises fine grain powders which consist of a spin reorientation type ferromagnetic material having a transition temperature range, below which transition temperature range the easy direction of magnetization of the spin reorientation type ferromagnetic material is predetermined in one crystallographic direction thereof and above which transition temperature range the easy direction of magnetization is a predetermined other direction perpendicular to the predetermined one crystallographic direction. The temperature sensitive element is produced by compacting the fine grain powders at a temperature higher than the transition temperature range. According to the present invention, it is possible to use a polycrystalline rare earth cobalt alloy material in the field where low Curie point ferrite has been used or where bimetals have been used for a thermal valve or a temperature controlling device.

公开(公告)号：US4347201A

公开(公告)日：1982-08-31

申请号：US089737

申请日：1979-10-31

申请人： Masato Sagawa ,  Wataru Yamagishi

发明人： Masato Sagawa ,  Wataru Yamagishi

IPC分类号： B22F1/00 ,  B22F3/14 ,  C22C1/04 ,  G01K7/36 ,  H01F1/00 ,  H01F1/01 ,  H01F1/055 ,  H01L37/04 ,  C04B35/50

CPC分类号： H01F1/0556 ,  B22F3/14 ,  C22C1/0441 ,  G01K7/38 ,  H01F1/012 ,  Y10S264/58 ,  Y10T29/49076

摘要： A temperature sensitive element comprises fine grain powders which consist of a spin reorientation type ferromagnetic material having a transition temperature range, below which transition temperature range the easy direction of magnetization of the spin reorientation type ferromagnetic material is predetermined in one crystallographic direction thereof and above which transition temperature range the easy direction of magnetization is a predetermined other direction perpendicular to the predetermined one crystallographic direction. The temperature sensitive element is produced by compacting the fine grain powders of a spin reorientation type ferromagnetic material at a temperature higher than the transition temperature range. A polycrystalline rare earth cobalt alloy material made in accordance with the invention can now be used in the field where low Curie point ferrite or where bimetals have been used previously for a thermal valve or a temperature controlling device.

摘要翻译： 温度敏感元件包括细晶粒，其由具有转变温度范围的自旋重新取向型铁磁材料组成，低于该转变温度范围，旋转重新取向型铁磁材料的易磁化方向在其一个晶体方向上被预先确定，并且其上方 转变温度范围内，容易的磁化方向是垂直于预定的一个晶体方向的预定的其它方向。 温度敏感元件通过在高于转变温度范围的温度下压制自旋重新取向型铁磁材料的细粒粉末来制备。 根据本发明制造的多晶稀土钴合金材料现在可以用于低居里点铁素体或双金属已经用于热阀或温度控制装置的领域。

公开(公告)号：US09831034B2

公开(公告)日：2017-11-28

申请号：US12673937

申请日：2008-08-20

申请人： Masato Sagawa

发明人： Masato Sagawa

IPC分类号： B22F1/00 ,  H01F41/02 ,  B22F3/087 ,  H01F1/057

CPC分类号： H01F41/0273 ,  B22F3/087 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00 ,  C22C2202/02 ,  H01F1/0577 ,  H01F41/0266 ,  C22C33/02 ,  B22F3/004 ,  B22F3/10 ,  B22F3/02 ,  B22F2202/05 ,  B22F3/1216

摘要： A mold which is inexpensive and easy to process and does not embrittle. Also provided is a process by which a sintered NdFeB magnet can be produced using the mold without suffering bending or deformation. At least part (e.g., a bottom plate) of the mold is made of a carbon material. Carbon materials have lower friction with a sinter during sintering than metals. The mold hence enables a sintered NdFeB magnet to be produced without suffering the bending or deformation caused by friction due to sintering shrinkage. Carbon materials are inexpensive and easy to process. The mold does not embrittle even when repeatedly used. Such effects can be significantly produced when a carbon material is used as the bottom plate, on which the load of the sinter is imposed during sintering.

公开(公告)号：US09589714B2

公开(公告)日：2017-03-07

申请号：US13383034

申请日：2010-07-09

申请人： Masato Sagawa

发明人： Masato Sagawa

IPC分类号： H01F1/057 ,  B22F3/10 ,  B22F1/00 ,  H01F7/02 ,  C22C38/00 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  B22F1/02 ,  H01F41/02

CPC分类号： H01F41/0293 ,  B22D11/001 ,  B22F1/025 ,  B22F3/1017 ,  B22F3/24 ,  B22F9/04 ,  B22F2003/241 ,  B22F2003/248 ,  B22F2009/044 ,  B22F2201/20 ,  B22F2202/05 ,  B22F2301/355 ,  B22F2998/10 ,  C22C38/001 ,  C22C38/002 ,  C22C38/004 ,  C22C38/005 ,  C22C38/06 ,  C22C38/10 ,  C22C38/16 ,  C23C10/30 ,  C23C12/02 ,  H01F1/053 ,  H01F1/0571 ,  H01F1/0577 ,  H01F1/086 ,  H01F7/02

摘要： Disclosed is a sintered NdFeB magnet having high coercivity (HcJ) a high maximum energy product ((BH)max) and a high squareness ratio (SQ) even when the sintered magnet has a thickness of 5 mm or more. The sintered NdFeB magnet is produced by diffusing Dy and/or Tb in grain boundaries in a base material of the sintered NdFeB magnet by a grain boundary diffusion process. The sintered NdFeB magnet is characterized in that the amount of rare earth in a metallic state in the base material is between 12.7 and 16.0% in atomic ratio, a rare earth-rich phase continues from the surface of the base material to a depth of 2.5 mm from the surface at the grain boundaries of the base material, and the grain boundaries in which RH has been diffused by the grain boundary diffusion process reach a depth of 2.5 mm from the surface.

摘要翻译： 公开了即使当烧结磁体的厚度为5mm以上时，具有高矫顽力（HcJ），高最大能量积（（BH）max）和高矩形比（SQ）的烧结NdFeB磁体。 NdFeB烧结磁体是通过晶界扩散法在DyFeB磁体烧结体的基材中的晶界扩散Dy和/或Tb而制造的。 烧结NdFeB磁体的特征在于，基材中金属状态的稀土元素的原子比为12.7〜16.0％，富稀土相从基材表面延伸至2.5的深度 在基材的晶界处的表面为mm，并且通过晶界扩散工艺扩散的RH的晶界从表面到达2.5mm的深度。